Catalog: Ball Screws
Company/Brand: RBC Bearings
ball thread screw in Ball Screws by RBC Bearings
table of contents pages 1 rbc ball screws 4-5 1.1 classification of ball screws 1 ... .2 standard precision ground ball screw availability table 1.3 standard ... precision rolled ball screw availability table 6-7 2.1 reliability ... coefficient 25-27 2 features of rbc ball screws 9 driving torque 9.1 ball screw ... torque during acceleration 27-29 3 rbc ball screw selection procedure flow chart 4 ... accuracy of rbc ball screws 4.1 lead accuracy 4.2 mounting accuracy ... method 10.3.3 dog stop method 29-31 5 screw shaft design 5.1 ball screw ... 5.4.2 dm·n value 5.5 precautions for screw design 5.5.1 thread runoff adjacent ... 6.1 nut selection 6.1.1 series 6.1.2 ball re-circulation type 6.1.3 design of ... nut designs 12 rbc precision ground ball screws dimensional tables 35-55 7 ...
2 features of rbc ball screws 2.1 reliability rbc s commitment to ... at each manufacturing process of the ball screw rbc s quality system is built on ... free operation for the life of the ball screw 2.2 high accuracy all rbc ball ... screw components undergo precision processing ... the high mechanical efficiency of rbc ball screws results from the rolling contact ... of precision ball bearings and precisely ground ball ... threads as compared to the relatively ... friction of the conventional acme screw ball screw power requirements are ... 80 60 40 20 0 0 2 4 6 8 10 acme screw linear to rotary motion helix angle ° ... mechanical efficiency of rbc precision ball screw 6 ...
is minimized on conventional acme lead screws the drive torque becomes excessive and ... smooth the axial play in rbc precision ball screws may be reduced to zero by ... the single radius and the gothic arch thread profile gothic arch single radius 2.5 ... result in superior durability of rbc ball screws 2.6 lead time rbc has readily ... length requirements within days custom ball screws require our industry leading 6 ...
mounting accuracy tolerances to use a ball screw correctly and achieve long life ... conform to both iso jis standards for ball screw measurement rbc will help you ... 1 bearing runout with respect to the ball groove 2 journal runout with respect to ... the ball groove 3 shoulder perpendicularity with ... perpendicularity with respect to the ball groove 5 nut body concentricity with ... respect to the ball groove 6 nut flat parallelism with ... respect to the ball groove 7 total indicated runout of the ... threaded portion of the shaft with respect to ... the shaft center line all rbc ball screws are manufactured inspected and ...
5 screw shaft design 5.1 ball screw manufacturing capability rbc s ... are shown below rbc has manufactured ball screws up to 6 in diameter and up to ... in length contact rbc if your required screw shaft dimensions exceed this scope 280 ... 260 240 220 screw threaded length inches manufacturing scope 200 ... 5.1 production scope rbc manufactures ball screws with specialized requirements ... including hollow ball screws for weight reduction or cooling ... purposes ball screws with specialty platings for corrosive ... combined right and left hand thread ball screws ball screws with specialized ...
5.5 precautions for screw design 5.5.1 thread runoff adjacent diameter the following ... to ensure an economical design for your ball screw application the ball thread ... runoff must extend off one end of the screw shaft for the following ball nut models ... is to facilitate the loading of the ball nut package a internal deflector type b ... 5.5.2 hardness/transition zone rbc s ball screw shaft is induction hardened thus ... zone may be present at each end of the screw thread area depending on the design ... the required accuracy delivery size and ball nut style must be considered when ... series for your application 6.1.2 ball re-circulation type select the ball re- ... circulation type according to the ball nut mounting and application standard ... tube type · suitable for large lead screw shaft diameter ratio ball deflector ...
7 indicates series type indicates thread directionrh or lh indicates iso lead ... indicates shaft length inches indicates ball nut style a std singlenut 2-circuit ...
7 indicates series type indicates threaded length of shaft indicated with of ...
12.4 gv series inch external ball return optional flange a c f type a i ... type abje thread form acfka type b f c type cbhbe thread ... form g e thread form a f c type d i type b c dhbjge ... thread form k major model no screw dia gv0502 gv0605 gv0602 gv0705 gv1005 ... 250 1.500 1.500 1.500 1.500 2.250 2.250 ball dia nut lead type a b max c d v ... thread form e lube hole dia f g max h max i ...
13.1 rms series metric external ball return optional flange continued k2 45 ... rms6310a 2 2 2 1,2 1,2 3 3 3 3 h v threads m30 m40 m40 m40 m40 m56 m60 m72 m85 ...
13.2 rs series inch external ball return optional flange continued k2 45 ... .50 0.50 0.50 0.50 0.50 0.50 0.50 h v threads 11/16-24 unef-2a 11/16-24 unef-2a 15/16 ...
backlash the free motion between the ball nut and screw shaft without rotation ... axial rigidity the resistance of the ball screw assembly to axial deflection ... load backdriving the ability of the ball nut or screw shaft to rotate when an ... to the opposite member of the assembly ball bearing the integral part of the ball ... screw assembly interspaced in the helical ... annulus between the nut and screw shaft which transmits axial motion ... and conforms to the accuracy of the ball path created by the assembly of the nut ... screws shaft and ball spacer ball idler a ball that acts as an idler ... from the interplay between load balls the diameter of which is smaller than ... the adjacent load balls and carries no axial thrust load ball ...
critical speed rotational speed of a ball nut or ball screw shaft that produces a ... resonant vibration of the ball screw shaft deflection elastic deformation ... the deformation of the ball screw assembly given an applied load ... actual force measured at a radius of a ball screw assembly with or without wipers ... including drag torque to actuate the ball screw assembly drunkenness the ... characteristic of a ball screw assembly under load and rotation the ... constant centric axial load that the ball screw can theoretically withstand for a ... revolutions efficiency 90 95 for ball screws measured by the following ... end journal the portion of the ball screw upon which is mounted the support ... or cycles fatigue life life of the ball screw assembly under the condition of a ...
leadactual the measured lead of the ball screw thread from a specified starting ... measured by the actual travel of the ball nut or accumulation of lead error of ... the threaded screw lead error the error in lead length ... specified life the usable life of a ball screw assembly given in terms of inches ... life and dissipate heat multiple thread a screw shaft with two or more ... independent threads nominal diameter specified diameter ... pitch the distance from a point on a ball track to a corresponding point on the ... next track parallel to the ball screw or ball nut axis pitch diameterball ... passing through the centers of the balls when they are in contact with the ball ... screw and ball nut tracks precision term used to ...
the axial distance traversed by the screw or nut in one direction turns the ... number of revolutions that the ball nut track makes about the screw axis ... one circuit vee-thread threaded portion of ball nut or screw shaft ... condition velocity refers to ball velocity within the ball track wipers ... protecting elements included in the ball nut to exclude foreign material and ... in lead error for one revolution of the ball nut 16 conversion factors a length 1m ...
